rule win_trochilus_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.trochilus_rat."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.trochilus_rat"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 668bd1 662b9650010100 bb00200000 663bd3 7e0d 8d9100e0ffff 66899650010100 }
            // n = 7, score = 100
            //   668bd1               | mov                 dx, cx
            //   662b9650010100       | sub                 dx, word ptr [esi + 0x10150]
            //   bb00200000           | mov                 ebx, 0x2000
            //   663bd3               | cmp                 dx, bx
            //   7e0d                 | jle                 0xf
            //   8d9100e0ffff         | lea                 edx, dword ptr [ecx - 0x2000]
            //   66899650010100       | mov                 word ptr [esi + 0x10150], dx

        $sequence_1 = { e9???????? 83bde8feffff01 750e 33c0 807dfa01 0f95c0 }
            // n = 6, score = 100
            //   e9????????           |                     
            //   83bde8feffff01       | cmp                 dword ptr [ebp - 0x118], 1
            //   750e                 | jne                 0x10
            //   33c0                 | xor                 eax, eax
            //   807dfa01             | cmp                 byte ptr [ebp - 6], 1
            //   0f95c0               | setne               al

        $sequence_2 = { 899ec0000000 899ec4000000 c786c8000000a0d27f00 c786cc00000028d77f00 c786d0000000a8d87f00 c786ac00000001000000 }
            // n = 6, score = 100
            //   899ec0000000         | mov                 dword ptr [esi + 0xc0], ebx
            //   899ec4000000         | mov                 dword ptr [esi + 0xc4], ebx
            //   c786c8000000a0d27f00     | mov    dword ptr [esi + 0xc8], 0x7fd2a0
            //   c786cc00000028d77f00     | mov    dword ptr [esi + 0xcc], 0x7fd728
            //   c786d0000000a8d87f00     | mov    dword ptr [esi + 0xd0], 0x7fd8a8
            //   c786ac00000001000000     | mov    dword ptr [esi + 0xac], 1

        $sequence_3 = { 50 6a02 bfffff0000 57 ff7630 c745e0204e0000 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   6a02                 | push                2
            //   bfffff0000           | mov                 edi, 0xffff
            //   57                   | push                edi
            //   ff7630               | push                dword ptr [esi + 0x30]
            //   c745e0204e0000       | mov                 dword ptr [ebp - 0x20], 0x4e20

        $sequence_4 = { 8b5df8 ff750c 53 e8???????? 83c40c 837e1a00 7511 }
            // n = 7, score = 100
            //   8b5df8               | mov                 ebx, dword ptr [ebp - 8]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   837e1a00             | cmp                 dword ptr [esi + 0x1a], 0
            //   7511                 | jne                 0x13

        $sequence_5 = { ff15???????? 8bf0 85f6 7431 8d45fc 50 ff15???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   7431                 | je                  0x33
            //   8d45fc               | lea                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_6 = { 83f908 7204 8b0e eb02 8bce 68???????? 52 }
            // n = 7, score = 100
            //   83f908               | cmp                 ecx, 8
            //   7204                 | jb                  6
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   eb02                 | jmp                 4
            //   8bce                 | mov                 ecx, esi
            //   68????????           |                     
            //   52                   | push                edx

        $sequence_7 = { 832300 ff8f18800000 33c0 eb03 6a0d 58 5e }
            // n = 7, score = 100
            //   832300               | and                 dword ptr [ebx], 0
            //   ff8f18800000         | dec                 dword ptr [edi + 0x8018]
            //   33c0                 | xor                 eax, eax
            //   eb03                 | jmp                 5
            //   6a0d                 | push                0xd
            //   58                   | pop                 eax
            //   5e                   | pop                 esi

        $sequence_8 = { 53 6a32 56 53 e8???????? 83c41c 68e8030000 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   6a32                 | push                0x32
            //   56                   | push                esi
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   68e8030000           | push                0x3e8

        $sequence_9 = { 83c704 ff4c2410 75d3 6a10 e8???????? 59 85c0 }
            // n = 7, score = 100
            //   83c704               | add                 edi, 4
            //   ff4c2410             | dec                 dword ptr [esp + 0x10]
            //   75d3                 | jne                 0xffffffd5
            //   6a10                 | push                0x10
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 630784
}